Michigan Synergy 3d blows only cold air in heat mode.

Discussion in 'Maintenance and Troubleshooting' started by Curious, Nov 21, 2023.

  1. Curious

    Curious New Member

    I HAVE GOT A SYNERGY 3D THAT ONLY BLOWS COLD AIR IN THE HEATING MODE. THE COMFORT ALERT SHOWS NO FAULT AND THE PANEL IS FLASHING GREEN.

    ANY IDEAS
     

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